Jack device for tractors and the like

ABSTRACT

A jack device is disclosed herein for raising a tractor or the like. The jack device comprises a horizontally disposed frame means having a pair of supports pivotally connected at their upper ends to the opposite ends thereof. Spaced apart wheels are provided on the lower ends of the supports. A hydraulic cylinder means extends between the supports and is adapted to pivotally move the supports with respect to the frame means. Means is provided on the upper end of the frame means for engagement with the tractor to support the same thereon. The hydraulic cylinder is extended so that the frame means is lowered to permit the jack to be positioned beneath the tractor. The hydraulic cylinder is then operated to retract the cylinder rod therein which causes the supports to pivotally move towards each other whereby the frame means is raised upwardly into engagement with the tractor which causes the tractor to be raised from its supporting surface.

[ Jan. 1, 1974 902,185 1/1954 Germany............................254/134 Primary Examiner-Othell M. Simpson Att0rney-Zarley et al.

[57] ABSTRACT A jack device is disclosed herein for raising a tractor orthe like. The jack device comprises a horizontally disposed frame meanshaving a pair of supports pivotally connected at their upper ends to theopposite ends thereof. Spaced apart wheels are provided on the lowerends of the supports. A hydraulic cylinder means extends between thesupports and is adapted to pivotally move the supports with respect tothe frame means. Means is provided on the upper end of the frame meansfor engagement with the tractor to sup- LIKE Inventor: Dellie J. Scott,Missouri Valley,

Iowa

Assignee: J. L. Peterson, Missouri Valley, Iowa a part interest Feb. 24,1972 Appl. No.: 228,927

US. 254/2 R, 254/124 Int. B60p 1/48, B66f 3/00 Field ofSearch.................. 254/93 R, 124, 126, 254/133, 134, 2 R, 2 B, 2C, 8 R, 8 B, 8 C; 214/512; 280/43, 43.12-43.16

References Cited UNITED STATES PATENTS United States Patent Scott JACKDEVICE FOR TRACTORS AND THE [22] Filed:

port the same thereon. The hydraulic cylinder is extended so that theframe means is lowered to permit the jack to be positioned beneath thetractor. The hydraulic cylinder is then operated to retract the cylinderrod therein which causes the supports to pivotally move towards eachother whereby the frame means is raised upwardly into engagement withthe tractor which causes the tractor to be raised from its supporte C mu S g .m 6 4 4 4 XR X XX X U3lUlUUl 42NM4M44MU W A DUSUJS/ OO/fi 24 4 445 5 W 2 2 2 n m UHNZ m m m wl w m u n m nhnt unm amne m m m eon "y btagtr rnmh f CUf fl -D GFATOF DPA 6002666933 1355555667 9999999999HHHHHHHHHH 2 5669362 5 6799862 5293585988 9027893059 6484440895222222333 FOREIGN PATENTS OR APPLICATIONS 324,829 9/l920 Germany 254/1243 Claims, 5 Drawing Figures JACK DEVICE FOR TRACTORS AND THE LIKETherefore, it is a principal object of this invention to provide animproved jack device for tractors and the like.

A further object of this invention is to provide a jack device havingmeans thereon for permitting the jack to accommodate various types oftractors.

A further object of this invention is to provide a jack device which isconveniently positioned beneath the tractor.

A further object of this invention is to provide a jack device which isoperated by the tractor hydraulic systern.

A further object of this invention is to provide a jack device which maybe used to raise and support the rearward end of the tractor or thefront end of the tractor.

A further object of this invention is to provide a jack device which iseconomical of manufacture, durable in use and refined in appearance.

These and other objects will be apparent to those skilled in the art.

This invention consists in the construction, arrangements andcombination of the various parts of the device, whereby the objectscontemplated are attained as hereinafter more fully set forth,specifically pointed out in the claims, and illustrated in theaccompanying drawings, in which:

FIG. 1 is a rear perspective view of the device of this invention;

FIG. 2 is a side view of the device positioned below the rearward end ofa tractor, the jack being in a lowered condition;

FIG. 3 is a view similar to FIG. 2 except that the jack has been raisedso that the rearward end of the tractor has been raised from itssupporting surface;

FIG. 4 is a side view of the device illustrating it being used to raisethe front end of a tractor; and

FIG. 5 is a perspective view of an attachment for the device.

The jack of this invention is referred to generally by the referencenumeral while the numeral 12 refers to a tractor having a rear frame 14positioned between the rear wheels 16 and 18. Tractor 12 also hasaconventional horizontally disposed drawbar support 20 which supportsthe drawbar (not shown). Tractor 12 includes a pair of front wheels 22(not shown) and 24 at the front end thereof which are supported by acon.- ventional axle support assembly.

Jack 10 comprises a substantially horizontally disposed frame means 28having ends 30 and 32 and an upper support area 34. A support means 36is pivotally connected at its upper end to end 30 and has a transverselyextending frame member 38 at its lower end. A pair of steel wheels 40and 42 are rotatably mounted at the opposite ends of the frame member 38as seen in FIG. 1. The wheels 40 and 42 have a narrow surface engagingarea which enhances the maneuverability of the device since the narrowsupporting surface tends to move over irregularities in the supportingsurface more readily than if a broad supporting surface were provided.

A support means 44 is pivotally connected at its upper end to end 32 andhas a transversely extending frame member 46 at its lower end. Steelwheels 48 and 50 are rotatably mounted at the opposite ends of the framemember 46 as illustrated in FIG. 1. The numeral 52 refers to a hydrauliccylinder means which is pivotally connected at its base end to thebracket 54 secured to frame member 38. The cylinder rod 56 of thehydraulic cylinder 52 is pivotally connected to the bracket 58 which issecured to frame member 46. The hydraulic cylinder 52 has a flexibleconduit 60 secured thereto which is in communication with the interiorof the cylinder to cause the retraction of the cylinder rod 56 into thecylinder 52. The conduit 60 is secured to the tractor hydraulic systemin conventional fashion to provide a convenient means for operating thejack.

Ear 64 extends outwardly from frame member 38 and has an opening 66formed therein. The numeral 68 refers to a positioning means including ahandle 70, wheels 72 and 74, and shaft stub 76 which may be insertedthrough the opening 66 to aid in positioning the jack beneath thetractor.

An elongated angle member 78 is secured to the rearward end of framemeans 28 by bolts or the like and extends outwardly thereof as seen inFIG. 1. A bracket 80 is positioned on the rearward side of the anglemember 78 for storing support blocks 82 and 84 therein at times. A pairof support blocks 86 and 88 are secured to the frame means 28 by chains90 and may be positioned on the angle member 78 as illustrated in FIG.I.

The numeral 92 generally refers to a support means which is removablyand slidably mounted on frame means 28. Support means 92 comprises acenter portion 94 which rests upon the support area 34 and a pair ofvertically disposed legs 96 and 98. The support blocks- 82 and 84 may bepositioned on the central portion 94 as desired for supporting a portionof the tractor frame means.

The numeral 100 also refers to a support means which is removablypositioned on the frame means 28. Support means 100 generally comprisesa base 102 which may be secured to the frame means 28 by the J- shapedbolts 104 and 106. Length adjustable support posts 108 and 110 extendupwardly from the base 102 and have plates 1 l2 and 1 14 at their upperends respectively. The support means 100 may be used for supporting thefront axle assembly of the tractor as illustrated in FIG. 4. Further,the support means 100 may be used to support any portion of the tractoras desired. The support means 100 may be used by itself or may be usedin conjunction with the support means 92 or the frame member 78.

The normal method of operation is as follows. Assuming that the jack 10is in its lowered position such as illustrated in FIG. 1, the first stepis to detachably secure the positioning means 68 to the ear 64 aspreviously described. The positioning means 68 is used to position thejack beneath that portion of the tractor that is to be raised. When thejack is in position, the flexible conduit 60 is connected to the tractorhydraulic system. If the tractor 12 has a horizontally disposed drawbarsupport 20, the support blocks 86 and 88 are positioned below thedrawbar support 20. The support means 92 is then slidably moved on theframe means 28 so that it is beneath the desired portion of the tractorframe. The support blocks 82 and 84 may then be positioned on the centerportion 94 if desired. The tractor hydraulic system is then actuated tocause the retraction of the rod 56 into the cylinder 52. Retraction ofthe rod 56 causes the support means 36 and support means 44 to bepivotally moved towards each other which causes the frame means 28 to beraised with respect to the supporting surface. The movement of thesupport means 36 and 44 towards each other is enhanced by the wheelsrolling upon the supporting surface. As the frame means 28 is raised,the support blocks 86 and 88 engage the underside of the drawbar supportand the blocks 82 and 84 engage the underside of the tractor frame sothat the rearward end of the tractor is raised to cause the rear wheelsto be moved out of engagement with the supporting surface. The fact thatthe tractor is supported at two spaced apart locations permits thetractor to be split in conventional fashion to facilitate repair of thetractor differential, transmission, etc.

Some types of tractors do not have the drawbar support 20 and in thosecases, the blocks 86 and 88 would be removed from the angle member 78.The angle member 78 would engage the rearward portion of the tractor andcould be detachably secured to a portion of the tractor by the bolts 116provided thereon.

The support means 100 provides a further means for supporting thetractor and may be used by itself or in conjunction with the othersupport means on the jack. For example, the support means 100 could beused in place of the support means 92 for supporting a portion of therearward end of the tractor. Additionally, the support means 100 may beused to support the front axle assembly of the tractor if desired.

When it is desired to lower the tractor, it is simply necessary tooperate the tractor hydraulic system control lever so that the rod 56 ispermitted to extend from the cylinder. The extension of the rod 56 fromthe cylinder causes the support means 36 and 34 to be moved away fromeach other so that the frame means 28 is lowered until it moves out ofengagement with the tractor. It should be noted that stops 118 areprovided on the support means 36 and 44 which are adapted to engage theframe means 28 to limit the pivotal movement of the support means 36 and44 towards each other.

Thus it can be seen that an extremely convenient and efficient jack hasbeen provided which is ideally suited for use in conjunction withtractors or the like. The jack is extremely versatile in that it may beadapted for use with a variety of different tractor models and sizes.The jack is extremely stable in use and is easy to operate. Thus it canbe seen that the jack accomplishes at least all of its statedobjectives.

I claim: I

l. A jack device comprising,

a first substantially horizontally disposed frame means having first andsecond ends and an upper support area,

a first support means having upper and lower ends and being pivotallysecured at its upper end to said one end of said first frame means,

a second support means having upper and lower ends and being pivotallysecured at its upper end to said second end of said first frame means,

said first support means having a pair of spaced apart wheels rotatablymounted on its lower end,

said second support means having a pair of spaced apart wheels rotatablymounted on its lower end,

an elongated angle member secured to said upper support area of saidfirst frame means at said first end thereof and being disposedtransversely with respect to said frame means, said elongated anglemember adopted to removably support block members thereon at times,

a third support means slidably and removably mounted on said uppersupport area of said first frame means adjacent said second end,

said angle member and third support means supporting the object to beraised,

a hydraulic cylinder means secured to and extending between said firstand second support means and having a cylinder rod movable betweenextended and retracted positions, said first frame means being in alowered position when said cylinder rod is in its extended position, theretraction of said cylinder rod into said cylinder means causing thelower ends of said first and second support means to be moved towardseach other thereby causing said first frame means to be raised to permitthe object supported thereby to be raised,

and means for controlling the operation of said hydraulic cylindermeans.

2. The jack device of claim 1 wherein a bracket is secured to said anglemember for storing support blocks therein at times.

3. The jack device of claim 1 wherein said third support means comprisesan elongated transversely extending member slidably mounted on saidupper support area, and upstanding legs at the opposite ends of saidtransversely extending member.

1. A jack device comprising, a first substantially horizontally disposedframe means having first and second ends and an upper support area, afirst support means having upper and lower ends and being pivotallysecured at its upper end to said one end of said first frame means, asecond support means having upper and lower ends and being pivotallysecured at its upper end to said second end of said first frame means,said first support means having a pair of spaced apart wheels rotatablymounted on its lower end, said second support means having a pair ofspaced apart wheels rotatably mounted on its lower end, an elongatedangle member secured to said upper support area of said first framemeans at said first end thereof and being disposed transversely withrespect to said frame means, said elongated angle member adopted toremovably support block members thereon at times, a third support meansslidably and removably mounted on said upper support area of said firstframe means adjacent said second end, said angle member and thirdsupport means supporting the object to be raised, a hydraulic cylindermeans secured to and extEnding between said first and second supportmeans and having a cylinder rod movable between extended and retractedpositions, said first frame means being in a lowered position when saidcylinder rod is in its extended position, the retraction of saidcylinder rod into said cylinder means causing the lower ends of saidfirst and second support means to be moved towards each other therebycausing said first frame means to be raised to permit the objectsupported thereby to be raised, and means for controlling the operationof said hydraulic cylinder means.
 2. The jack device of claim 1 whereina bracket 80 is secured to said angle member for storing support blockstherein at times.
 3. The jack device of claim 1 wherein said thirdsupport means comprises an elongated transversely extending memberslidably mounted on said upper support area, and upstanding legs at theopposite ends of said transversely extending member.